X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?p=palacios.git;a=blobdiff_plain;f=palacios%2Fsrc%2Fpalacios%2Fvmm_sym_iface.c;fp=palacios%2Fsrc%2Fpalacios%2Fvmm_sym_iface.c;h=0c6414d1c6fb28f3892b719fc46121466f58964b;hp=0000000000000000000000000000000000000000;hb=e63be432894673d56526c4f1c2cb4fa64daf01d9;hpb=c3714b74821dffe63b2fdcf10d8fe614c5ac9bb1

diff --git a/palacios/src/palacios/vmm_sym_iface.c b/palacios/src/palacios/vmm_sym_iface.c
new file mode 100644
index 0000000..0c6414d
--- /dev/null
+++ b/palacios/src/palacios/vmm_sym_iface.c
@@ -0,0 +1,109 @@
+/* 
+ * This file is part of the Palacios Virtual Machine Monitor developed
+ * by the V3VEE Project with funding from the United States National 
+ * Science Foundation and the Department of Energy.  
+ *
+ * The V3VEE Project is a joint project between Northwestern University
+ * and the University of New Mexico.  You can find out more at 
+ * http://www.v3vee.org
+ *
+ * Copyright (c) 2008, Jack Lange <jarusl@cs.northwestern.edu> 
+ * Copyright (c) 2008, The V3VEE Project <http://www.v3vee.org> 
+ * All rights reserved.
+ *
+ * Author: Jack Lange <jarusl@cs.northwestern.edu>
+ *
+ * This is free software.  You are permitted to use,
+ * redistribute, and modify it as specified in the file "V3VEE_LICENSE".
+ */
+
+
+#include <palacios/vmm.h>
+#include <palacios/vmm_msr.h>
+#include <palacios/vmm_mem.h>
+
+#define SYM_MSR_NUM 0x535
+
+
+
+
+static int msr_read(uint_t msr, struct v3_msr * dst, void * priv_data) {
+    struct guest_info * info = (struct guest_info *)priv_data;
+    struct v3_sym_state * state = &(info->sym_state);
+
+    dst->value = state->guest_pg_addr;
+
+    return 0;
+}
+
+static int msr_write(uint_t msr, struct v3_msr src, void * priv_data) {
+    struct guest_info * info = (struct guest_info *)priv_data;
+    struct v3_sym_state * state = &(info->sym_state);
+
+    if (state->active == 1) {
+	// unmap page
+	struct v3_shadow_region * old_reg = v3_get_shadow_region(info, (addr_t)state->guest_pg_addr);
+
+	if (old_reg == NULL) {
+	    PrintError("Could not find previously active symbiotic page (%p)\n", (void *)state->guest_pg_addr);
+	    return -1;
+	}
+
+	v3_delete_shadow_region(info, old_reg);
+    }
+
+    state->guest_pg_addr = src.value;
+    state->guest_pg_addr &= ~0xfffLL;
+
+    state->active = 1;
+
+    // map page
+    v3_add_shadow_mem(info, (addr_t)state->guest_pg_addr, 
+		      (addr_t)(state->guest_pg_addr + PAGE_SIZE_4KB - 1), 
+		      state->sym_page_pa);
+
+    return 0;
+}
+
+
+
+int v3_init_sym_iface(struct guest_info * info) {
+    struct v3_sym_state * state = &(info->sym_state);
+    
+    memset(state, 0, sizeof(struct v3_sym_state));
+
+    PrintDebug("Allocating symbiotic page\n");
+    state->sym_page_pa = (addr_t)V3_AllocPages(1);
+    state->sym_page = (struct v3_sym_interface *)V3_VAddr((void *)state->sym_page_pa);
+
+    PrintDebug("Clearing symbiotic page\n");
+    memset(state->sym_page, 0, PAGE_SIZE_4KB);
+
+    PrintDebug("hooking MSR\n");
+    v3_hook_msr(info, SYM_MSR_NUM, msr_read, msr_write, info);
+
+    PrintDebug("Done\n");
+    return 0;
+}
+
+int v3_sym_map_pci_passthrough(struct guest_info * info, uint_t bus, uint_t dev, uint_t fn) {
+    struct v3_sym_state * state = &(info->sym_state);
+    uint_t dev_index = (bus << 16) + (dev << 8) + fn;
+    uint_t major = dev_index / 8;
+    uint_t minor = dev_index % 8;
+
+    state->sym_page->pci_pt_map[major] |= 0x1 << minor;
+
+    return 0;
+}
+
+int v3_sym_unmap_pci_passthrough(struct guest_info * info, uint_t bus, uint_t dev, uint_t fn) {
+    struct v3_sym_state * state = &(info->sym_state);
+    uint_t dev_index = (bus << 16) + (dev << 8) + fn;
+    uint_t major = dev_index / 8;
+    uint_t minor = dev_index % 8;
+
+    state->sym_page->pci_pt_map[major] &= ~(0x1 << minor);
+
+    return 0;
+}